Doors

These brain teasers rely on your ability to recognize groups of common attributes. For each of these puzzles you'll need to figure out why the words or letters are grouped as they are. Sometimes you will be asked to pick the odd-one-out or to place a new word into the correct group.

Captain Jonathan Frakes is leading his crew on a long, exhausting journey through the treasure vaults of the late Doug the Despot, who amassed fabulous wealth and hid it away in catacombs beneath the Capital City of Earth. Unfortunately for treasure hunters, Doug also laid several nasty booby traps along the way in the form of puzzles. One of these puzzles is five numbered doors. There is an inscription above them.

"One of us right; four of us wrong.
Four are alike; one doesn't belong."